<!DOCTYPE html>
<html lang="en">
    <head>
        <meta charset="UTF-8">
        <title></title>
        <link rel="stylesheet" href="bootstrap.min.css">
    </head>
    <body>
        <nav class="navbar navbar-default navbar-fixed-top topnav" role="navigation">
            <div class="container-fluid">
                <div class="navbar-header">
                    <a class="navbar-brand" href="#">我们</a>
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                <div>
                    <ul class="nav navbar-nav ">
                        <li class="active"><a href="#child">小时候</a></li>
                        <li><a href="#older">后来</a></li>
                        <li><a href="#now">现在</a></li>
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                <div>
                <!-- /.container -->
        </nav>
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</html>
